Given the values in the probability distribution table, determine the standard deviation.

a. 3.2
b. 13.9
c. 3.9
d. 2.0

Bruce is getting materials for a chemistry experiment his teacher gives him a container that has 0.25 liter of liquid in it.bruce need to use 0.4 of this liquid for the experiment. how much liquid will bruce use?

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.